geomorphology & earth landforms section 6 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (d)

1. The White Cliffs of Dover are cliffs that form part of the English coastline facing the Strait of Dover and France. The cliffs are part of the North Downs formation.
2. The Mohawk Valley region of the U.S. state of New York is the area surrounding the Mohawk River, sandwiched between the Adirondack Mountains and the Catskill Mountains.
3. Mount Kilimanjaro, with its three volcanic cones, Kibo, Mawenzi, and Shira, is a dormant volcanic mountain in Tanzania.

Answer: (d)

Fold Mountains form when two tectonic plates move together (a convergent plate boundary). Fold Mountains form from sedimentary rocks that accumulate along the margins of continents.

Answer: (d)

In geology, a nappe or thrust sheet is a large sheet-like body of rock that has been moved more than 2 km or 5 km from its original position by faulting or folding.

They form when a mass of rock is forced (or 'thrust') over another rock mass, typically on a low angle fault plane. The resulting structure may include large-scale recumbent folds, shearing along the fault plane.

Answer: (b)

Dolomite a sedimentary rock resembling limestone but consisting principally of the mineral dolomite. It is an important source of magnesium and its compounds and is used as a building material and refractory.

Dolomite is used as an ornamental stone, a concrete aggregate, a source of magnesium oxide and in the Pidgeon process for the production of magnesium. It is an important petroleum reservoir rock and serves as the host rock for large stratabound Mississippi Valley-Type (MVT) ore deposits of base metals such as lead, zinc, and copper. Where calcite limestone is uncommon or too costly, dolomite is sometimes used in its place as a flux for the smelting of iron and steel. Large quantities of processed dolomite are used in the production of float glass.

Answer: (b)